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Microchip Technology 1PMT5940BE3/TR7
- Part No.:
- 1PMT5940BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5940BE3/TR7.pdf
- Description:
- DIODE ZENER 43V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,799
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Product details
Overview
1PMT5940BE3/TR7 from Microsemi is a 43 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 53 Ω dynamic impedance at 8.7 mA test current and 950 µA max reverse leakage at 32.7 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5940BE3/TR7 datasheet, 1PMT5940BE3/TR7 pinout, 1PMT5940BE3/TR7 application, or 1PMT5940BE3/TR7 equivalent, key selection criteria include its 43 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to regulate or clamp voltage with tight voltage tolerance and low dynamic impedance. Its full metallic bottom and integral locking tab provide direct thermal conduction to PCB copper and mechanical stability during reflow.
The device is characterized at TL = 30°C with Zener voltage measured 20 seconds after applying DC test current; knee impedance (ZZK = 0.25 Ω) and knee current (IZK = 950 µA) confirm stable low-current regulation behavior below IZT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at IZT = 8.7 mA - defines clamping threshold for overvoltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without external heatsink |
| Dynamic Impedance (ZZT) | 53 Ω at IZT - ensures minimal output voltage variation under load current changes |
| Reverse Leakage (IR) | ≤950 µA at VR = 32.7 V - guarantees low standby power loss in always-on bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows accurate thermal design using PCB copper area as heatsink |
| ESD Rating | >16 kV HBM - provides robust handling in automated SMT lines without additional ESD safeguards |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical connection point; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 per DO-216 mechanical drawing |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling comparable to through-hole DO-41 devices |
| Full metallic bottom | Eliminates solder flux entrapment risk and improves thermal transfer efficiency to PCB ground plane |
| Integral heat-sink locking tab | Provides mechanical anchoring during reflow and enhances thermal conduction from junction to board |
| EIA-481 tape-and-reel packaging | Supports high-speed pick-and-place placement at 3,000 pcs per 7-inch reel |
Applications
| Industrial Power Supply Monitoring | Automotive Body Control Module (BCM) Clamping |
|---|---|
Use Scenario: Monitoring 48 V intermediate bus in programmable logic controller (PLC) power stage. IC Role / Device Role / Timing Role: Zener clamping element protecting ADC input and supervisor IC against overvoltage transients. Use Value: 43 V breakdown voltage aligns precisely with system overvoltage trip threshold; 53 Ω ZZT minimizes measurement error during transient events. | Use Scenario: Suppressing load-dump spikes on 12 V CAN node power rail in automotive BCM. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing energy from inductive loads during ignition switch-off. Use Value: 3.0 W rating sustains 100 ms load-dump pulses per ISO 7637-2; >16 kV HBM ESD rating prevents field failure during assembly. |
| Telecom DC-DC Converter Reference | Medical Infusion Pump Voltage Clamp |
Use Scenario: Providing stable 43 V reference for feedback loop in isolated flyback converter powering telecom line card. IC Role / Device Role / Timing Role: Precision Zener reference establishing output voltage setpoint with ±5% initial accuracy. Use Value: Tight 5% tolerance and low ZZT ensure <±1% output regulation across line/load/temperature variations. | Use Scenario: Clamping microcontroller supply rail during motor driver switching in battery-powered infusion pump. IC Role / Device Role / Timing Role: Overvoltage protector preventing latch-up or damage during back-EMF events. Use Value: Metallic tab conduction enables reliable 3.0 W clamping without added heatsink-critical for compact, sealed enclosure design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ43A | TVS diode (not Zener); 43 V standoff, 600 W peak pulse power, higher clamping voltage (69.4 V) | Designed for surge suppression, not precision regulation | Choose only for transient-only protection where regulation accuracy is irrelevant |
| BZX84-C43 | SOT-23 package; 43 V ±5%, 300 mW power rating, 90 Ω ZZT, no metallic thermal tab | Limited to low-power bias/reference use; unsuitable for 3 W clamping | Select when space-constrained and thermal load <300 mW; avoid for power rail clamping |
Compared with SMCJ43A and BZX84-C43, the 1PMT5940BE3/TR7 uniquely combines 43 V precision regulation, 3.0 W continuous dissipation, and direct PCB thermal coupling-making it the only option for high-energy, accuracy-critical Zener applications in industrial and automotive systems.
Availability
1PMT5940BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom DC-DC converters, and medical infusion pumps requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1PMT5940BE3/TR7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener series-including 1PMT5940BE3/TR7-is engineered for high-power surface-mount voltage regulation in harsh-environment applications where thermal performance, ESD robustness, and automated assembly compatibility are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5940BE3/TR7?
The 1PMT5940BE3/TR7 has a standard Zener voltage tolerance of ±5% at 43 V, measured at IZT = 8.7 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5940BE3/TR7 specifies ±5%.
Can 1PMT5940BE3/TR7 be used in place of through-hole Zeners like 1N5257B?
No-1PMT5940BE3/TR7 is not a drop-in replacement for 1N5257B. While both are 43 V Zeners, 1PMT5940BE3/TR7 uses the DO-216 Powermite® package with thermal tab (TAB 1 as cathode), whereas 1N5257B is DO-35 with axial leads. PCB layout, thermal design, and mounting process differ fundamentally.
What is the maximum reverse voltage that can be continuously applied to 1PMT5940BE3/TR7 without breakdown?
The maximum non-breakdown reverse voltage for 1PMT5940BE3/TR7 is 32.7 V, defined as VR-the voltage at which reverse leakage current IR is guaranteed ≤950 µA. Operating above this voltage risks entering unregulated breakdown unless intended for Zener operation.
How is thermal performance validated for 1PMT5940BE3/TR7?
Thermal performance of 1PMT5940BE3/TR7 is specified as 30°C/W junction-to-TAB1, verified under DC conditions with TAB 1 maintained at 60°C. Full 3.0 W dissipation requires adequate PCB copper area connected to TAB 1; derating applies if TAB temperature exceeds 60°C or ambient exceeds 150°C junction limit.
Is 1PMT5940BE3/TR7 compatible with lead-free reflow profiles?
Yes-1PMT5940BE3/TR7 is qualified for standard lead-free reflow per J-STD-020, with peak temperature up to 260°C. Its molded Powermite® package and metallic bottom are designed for compatibility with Pb-free SAC305 solder paste and standard 8–10 minute reflow profiles.
1PMT5940BE3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 53 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 32.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-216AA
1PMT5940BE3/TR7 FAQ
1.How can I place an order for 1PMT5940BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5940BE3/TR7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1PMT5940BE3/TR7 reliable?
The price and inventory of 1PMT5940BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5940BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5940BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5940BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5940BE3/TR7?
1PMT5940BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5940BE3/TR7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1PMT5940BE3/TR7?
For technical support, including 1PMT5940BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5940BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5940BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5940BE3/TR7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1PMT5940BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5940BE3/TR7?
All 1PMT5940BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5940BE3/TR7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1PMT5940BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5940BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5940BE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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